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A165724
Digit sums of
A092571
.
0
7, 13, 19, 55, 103, 121, 127, 163, 253, 391, 721, 793, 1063, 1441, 2719, 3313, 9595, 13045, 17863, 21889, 46243, 49891
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OFFSET
1,1
COMMENTS
Primes in this sequence are 7, 13, 19, 103, 127,163, ....
LINKS
Table of n, a(n) for n=1..22.
Dario Alpern,
Factorization using the Elliptic Curve Method
FORMULA
a(n) = 1 + 6*
A056658
(n). [
R. J. Mathar
, Sep 25 2009]
a(n) =
A007953
(
A092571
(n)). -
Michel Marcus
, Jul 07 2023
EXAMPLE
The digit sum of 6666666666666666666666666666666666666666661 is 253.
CROSSREFS
Cf.
A007953
,
A056658
,
A092571
.
Sequence in context:
A109558
A108106
A231506
*
A144232
A154756
A024732
Adjacent sequences:
A165721
A165722
A165723
*
A165725
A165726
A165727
KEYWORD
base
,
nonn
,
more
AUTHOR
Parthasarathy Nambi
, Sep 25 2009
EXTENSIONS
More terms from
R. J. Mathar
, Sep 25 2009
STATUS
approved